On Mon, 13 Apr 2015 11:16:52 +0100 Mel Gorman <mgorman@xxxxxxx> wrote: > Memory initialisation I wish we didn't call this "memory initialization". Because memory initialization is memset(), and that isn't what we're doing here. Installation? Bringup? > had been identified as one of the reasons why large > machines take a long time to boot. Patches were posted a long time ago > that attempted to move deferred initialisation into the page allocator > paths. This was rejected on the grounds it should not be necessary to hurt > the fast paths to parallelise initialisation. This series reuses much of > the work from that time but defers the initialisation of memory to kswapd > so that one thread per node initialises memory local to that node. The > issue is that on the machines I tested with, memory initialisation was not > a major contributor to boot times. I'm posting the RFC to both review the > series and see if it actually helps users of very large machines. > > ... > > 15 files changed, 507 insertions(+), 98 deletions(-) Sadface at how large and complex this is. I'd hoped the way we were going to do this was by bringing up a bit of memory to get booted up, then later on we just fake a bunch of memory hot-add operations. So the new code would be pretty small and quite high-level. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>